Download latest version of libvips from github.
Download latest version of libvips from github.

Signed-off-by: Yoan Blanc <4ca5a1a3d0d72506483d7c4cb7257ec2f3d4fa4f@dosimple.ch>

h2non/bimg,greut/bimg,h2non/bimg,greut/bimg,h2non/bimg,greut/bimg